21820785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2927}}^1$

素因数の和:3013

約数の個数: 32

約数和(自身を含む): 40476672

約数和(自身を除く): 18655887

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2927, 7455, 8781, 14635, 20489, 43905, 61467, 102445, 207817, 307335, 623451, 1039085, 1454719, 3117255, 4364157, 7273595, 21820785]

約数ペア:

[(1, 21820785), (3, 7273595), (5, 4364157), (7, 3117255), (15, 1454719), (21, 1039085), (35, 623451), (71, 307335), (105, 207817), (213, 102445), (355, 61467), (497, 43905), (1065, 20489), (1491, 14635), (2485, 8781), (2927, 7455)]